Locking means for doors of elevator-shafts



, (No Model.) 7

5 T. VAN KANNEL. V LOOKING MEANS FOR nouns 0F ELEVATOR SHAFTS.

No. 552,652. Patented Jan. 7, 1896.

w v I ////A AN DREW B.GRA1AM, PHOTO-WHO. WASHINGTON. D C

IlNrrnn STATES PATE T OFFICE.

TIIEOPHILUS VAN KANNEIJ, OF ROGKFORD,ILLINOIS.

LOCKING MEANS FOR DOORS OFELEVATOR-SHAFTS.

SPECIFICATION forming part of Letters Patent No. 552,652, dated January '7, 1896 ApplicationfiledAugustQQ,1865. seam... 560,859. (No model.)

To aZZ whom it may concern.-

Be it known that I, THEoPHILUs VAN KAN- NEL, a citizen of the United States, residing at Rockford, in the county of WVinnebago and State of Illinois, have invented a new and useful Improvement in Looking Means for the Doors of Elevator-Shafts, of which the following is a specification.

The object of my invention is to provide the sliding doors at the different landings of the shaft by dotted lines; Fig. 2, an enlarged broken view, in section, of the threaded sec- .tional rod carrying a locking-head, the section being taken at the line 2 on Fig. 1 and viewed in the direction of the arrow; Fig. 3, an enlarged broken view of the rod with a locking-head thereon shown in side elevation; and Fig. 4, a section taken at the line at on Fig. 1, viewed in the direction of the arrow and enlarged. A denotes an elevator-shaft, and B B denote the sliding doors thereof, one provided at each landing, so that while only three of the doors are shown it is to be understood that the number thereof may correspond with the number of landings, and that my improved mechanism, hereinafter described, is to be arranged accordingly. On each door B, and projecting beyond the forward edge thereof, is a catch or finger r.

O is a rod supported to extend vertically in the shaft adjacent to the forward edges of the shaft-doors, and which I prefer to form in longitudinal sections connected by couplings t and threaded for some distance from their ends. This sectional construction of the rod avoids the necessity for threading it throughout. To support the rod, I suspend it from its upper end on a cable 19 passing about pulleys p and p respectively provided at the upper end of the shaft A and outside the latley o to the drum-shaft q.

ter at the upper end of a side well A extending parallel with the shaft, the cable extending downward in i the well A to and being connected With a shaft q of one of the drums D and D of the hoisting mechanism D, that indicated being of a well-known hydraulic variety, about the drums of which the cables .0, which carry the cab E, are wound in the usual manner.

For a purpose hereinafter described I pre- I fer to provide a weight a on the lower end of the rod G and to suspend on the'cable p a greater weight u, from which I extend another length 19 of the cable over a guide-pul- On the rod 0 are provided locking-heads F, one for each shaft-door. As shown, each head F is substantially in the form of a sector pivoted at one end 011 a pin 02 extending in suitable position relative to a door from divided by a slot m, and which should be concentric with the center 01. Each head carries 011 a stem Z, extending from one side, a sleeve Z to surround the rod 0 and at which the head is adjustably fastened in place by means of nuts Z engaging the threads on the rod to bear against the opposite ends of the sleeve Z.

It will be noticed that the slots m in the flanges m occupy different positions on the heads F, the arrangement being such that the extent of cable 0 wound upon or unwound from the drums D D in the travel of the elevator-cab winds upon or unwinds from the shaft q such a length of the cable 19 as will lower or raise the rod 0 an extent to bring the slot in the flange m of the locking-head F for each shaft-door B coincident with the catch 9" on the door when the cab reaches the corresponding landing. Thus, as shown, the

.cab E is at the second landing, and the slot m in the flange m on the head F at that landing coincides with the catch 1' on the corresponding shaft-door. If the cab descends to the lower landing the simultaneous lowering of the rod C will bring the slot in the flange of the lower locking-head coincident with the catch on the shaft-door at the lower landing and permit it to be opened, and the descent of the rod will accordingly turn the the shaft-wall, the flaring end of the head.- being provided on one side with a flange m,

head F of the middle landing 011 its pivot n sufficiently to carry the slot in its flange past the catch on the middle shaft-door, locking the latter against being opened, because the flange on that head is then presented to the catch instead of the slot. It will, therefore, be apparent that in the ascent or descent of the cab all the shaft-doors are locked until the cab reaches a landing, when the shaftdoor at that landing is unlocked and may be opened.

I provide the weights a and a to prevent breakage in the event that the locking-heads shall be obstructed in their operation. If the combined weight of the several locking-heads and the rod carrying them amounts to, say, fifty pounds and the weight a be, say, twenty-five pounds, making a total of sev enty-five pounds, the weight a should then be about one hundred pounds. The weight a is lifted by the winding mechanism, causing the rod to descend, and the reverse motion allows the weight a to act to overcome the aggregate weight of seventy-five pounds referred to on the rod, which will then rise.

If the cable 13, which is moved by the hoisting mechanism, were attached directly to the cable 13, and any of the locking-heads or other parts should become fouled, something would break, whereas by my improved arrangement the entire power applied is no greater than the difference between the two weights.

While the particular construction of my improved safety-lock mechanism for elevator-shaft doors is the best known to me for the purpose, it may be variously modified as to details without departure from my invention. Hence I do not limit my invention to the exact details shown and described, eX cept Where particularly set forth in the appended claims.

What I claim as new, and desire to secure by Letters Patent, is-

1. In combination with the doors of an elevator-shaft and the cab audits hoisting mechanism, catches on the doors, and lockingheads suspended in the shaft to normally engage said catches to lock the doors and connected with the hoisting mechanism to be raised and lowered with the movements of the cab, proportionately thereto, to unlock the catch on each door when the cab reaches the landing corresponding therewith, substantially as described.

2. In combination with the doors of an elevator-shaft and the cab and its hoisting mechanism, catches on the doors, arod suspended in the shaft by a cable connected with the hoisting mechanism, to cause the rod to be raised and lowered with the movements of the cab, proportionately thereto, and lockingheads pivoted in the shaft and confined on the rod in positions to normally engage said cables to lock the doors, whereby the ascent and descent of the rod with the movements of the cab unlock the catch on each door when the cab reaches the landing corresponding therewith, substantially as described.

3. In combination with the doors of an elevator-shaft and the cab and its hoisting mechanism, catches on the doors, a rod suspended in the shaft by a cable connected with the hoisting mechanism to cause the rod to be raised and lowered with the movements of the cab, proportionately thereto, and lockingheads pivoted in the shaft and adj ustably confined on the rod in positions to normally engage said catches to lock the doors, whereby the ascent and descent of the rod with the movements of the cab unlock the catch on each door when the cab reaches the landing corresponding therewith, substantially as described.

4. In combination with the doors of an elevator-shaft and the cab and its hoisting mechanism, catches on the doors, a rod C suspended in the shaft by a cable connected with the hoisting mechanism to cause the rod to be raised and lowered with the movements of the cab, proportionately thereto, and locking heads F provided at their free ends with flanges m having slots m and pivoted at their opposite ends and confined on the rod in positions to normally engage, at their flanges, the said catches to lock the doors, whereby the ascent and descent-of the rod with the movemen ts of the cab turn the heads on their pivots to bring the slot in a head coincident with the catch on a door when the cab reaches the landing-correspondin g therewith, substantially as described.

5. In combination with the doors of an elevator-shaft and the cab and its hoisting mechanism, catches 0" on the doors, a red C suspended in the shaft by a cable connected with the hoisting mechanism to cause the rod to be raised and lowered with the movements of the cab, proportionately thereto, and lockingheads F provided at their free ends with flanges on having slots m and pivoted at their opposite ends and provided with sleeves Z at which they are confined on the rod in positions to normally engage, at their flanges, the said catches to lock the doors, whereby the ascent and descent of the rod with the movements of the cab turn the heads on their pivots to bring the slot in ahead coincident with the catch on a door when the cab reaches the landing corresponding therewith, substantially as described.

6. In combination with the doors of an elevator-shaft and the cab and its hoisting mechanism D, catches r on the doors, a rod 0 suspended in the shaft by a cable connected with the shaft q of said hoisting mechanism to cause the rod to be raised and lowered with the movements of the cab, proportionately thereto, and locking-heads F provided. at their free ends with flanges m having slots m and pivoted at their opposite ends and confined on the rod in positions to normally engage, at their flanges, the said catches to lock the doors,

whereby the ascent and descent of the rod with the movements of the cab turn the heads on their pivots to bring the slot in a head coincident with the catch on a door When the cab 5 reaches the landing corresponding therewith,

substantially as described.

7. In combination With the doors of an elevator-shaft and the cab and its hoisting mechanism, catches on the doors, a rod suspended Is in the shaft by a cable 10, a Weight w on said cable and connected by a cable 1) with the shaft (1 of said hoisting mechanism, a Weight w on the rod, and locking-heads F pivoted in the shaft and confined on the rod in positions to normally engage said catches to lock the doors and to unlock the catch on a door when the cab, in its movements, reaches the 

